/Engine/Plugins/Online/OnlineFramework/Source/Party/Public/SocialToolkit.h
Called when a Friend's presence did change
virtual void OnFriendPresenceDidChange ( const [USocialUser](API\Plugins\Party\User\USocialUser) & FriendSocialUser, const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FOnlineUserPresence](API\Plugins\OnlineSubsystem\Interfaces\FOnlineUserPresence) > & NewPresence, [ESocialSubsystem](API\Plugins\Party\ESocialSubsystem) SubsystemType )